Liquid Nitrogen cooling! -196°C!
wow thats some scary low temps, check this link out if you havent seen it already. http://www.tomshardware.com/cpu/20031230/ completely insane 5ghz!
BTW good luck with the dry Ice, try taking some video for us to see.
Did you try soldering? or useing the stuff that Plumbers use, for there pipes, i think its the same thing, a torch and solder. ez just put a shitload on. lol you will tell though.